Doughnut-baking machine



W. WALLACE.

DOUGHNUT BAKING MACHINE.

APPLICATION FILED APR. 13. 1920.

1,356,573, Patented 0011.26, 1920.

2 SHEETSSHEET I.

W133i 5355; l INVENTOR Wl l aflace. BY

W. WALLACE.

DOUGHNUT BAKING MACHINE.

APPLICATION FILED APR. 13, 1920.

1,356,573, 7 Patented Oct. 26, 1920.

2 SHEETSSHEET 2.

- UNITED STATES PATENT] on-Ice.

" winmwmnen, or ron'rmxn, onneon.

nouemrsnnxmc To all whom it may-concern:

, Be it known that I,-W1I.L1AM Wanner, a citizen of the United States, residing at Portland, in the county of Multnomahand State vof-Oregon, have invented a new and useful Doughnut-Bakin Machine, of which the following is a speci cation.

' -My invention relates to doughnut baking machines in which the dough rings arer e-. ceived on an endless conveyer, submerged in boiling oil, after a certain time lifted from the oil, dried, and finally deposited in'a storage receptacle.

The objects of my invention are: to pro-. duce a machine which will insure uniform baking of doughnuts, and perform this work automatically and ina sanitary manner.

illustrated in the in whichy p Figure I is a side elevation of the entire apparatus.

Fig. II is a plan view of Fig. I.

Fig. III is a longitudinal section through Fi I.

Fig. IV is a cross section through Fig. III along the line aa.

Fig. V is a cross section through Fig. III along the line b-b.

Fig. VI -'s a perspective view of the baffle plate construction.

Fig. VII is a detailof the carrier chain.

Similar numerals refer to similar parts throughout the several views.

On a suitable support 1 is placed the elongated kettle 2 partly; filled with oil. Immersed in the oil, at the tail end of the ketaccompanying drawings,

'tle are the two sprocket wheels 3; while the -surface of the oil to form with the sides of the kettle a pen from which a doughnut, when placed therein, cannot escape. The upper run' of the conveyer being slack and moving toward the head end, it is a simple matter to guide the carrier chains by properly curved angle irons 6 into a submerged tunnel 7 where the doughnuts are evenl browned all over. The floor 8 of the tunne composed of flat bars longitudinally placed and attached to the angle irons 6 proceeds the next one drops. create, where the doughnuts are deposited, a"

tance and then inclines upward toward the Specification 01 Letters me t. P t t O t, ,1 I Application fled April 13; 1920. Serial menses.

sprocket wheels-4. Here the doughnutsare drained of excess fat and finally deposited intoa receptacle 9 attached at 10 to the head end of the kettle. The roof 11 of the tunnel is of similar construction as the floor, and suspended from thev edges of the kettle bv the straps 12. The function of the roof, to hold the dou hnuts submerged'in oil, havin" been fulfilled run, said roof need not be carried any farther. The taut run of the carrier chains is guided over suitable angle irons 13, to prevent the frail Wire railings from being bentat the bottom. of the. kettle, sprocket wheels. at the tail end. I attain these objects with themechanism back to the Since my kettle is intended 'to be wide enoughtocarry three or more doughnuts in one row, and the doughnuts are preferably deposited by an automatic dough mixing and cutting machine, the last fallen doughnut should be out of the way before For this purpose I t the end of the horizontal.

circulation of oil by means of a bafiie plate construction, illustrated in Fig. VI. As the heatedioil rises between the side walls 14 it -is led along the inclined plate 15 and emerges through the apertures 16. From there it flows over the top wall 17 toward the other side of the kettle, carrying the doughnut which is dropped over the apertures with it. The main purpose of the top wall 17, however, is to prevent the doughnuts from falling to the bottom of the kettle. The lugs 18 at the end of the bafiie plate construction serve to attach the latter to the side wallsof the kettle without interfering with carrier chains or s rocket wheels.

To fill one pen with tiiree or more doughnuts requires that the conveyer should stop, while the'substitution of the filled pen for an empty one requires forward motion of'the conveyer. One way to produce this intermittent motion is shown most clearl in Fig. I where it appears that the sha 19 on which the sprocket wheels 3 are keyed is con nected with the drivin motor 20 through ments to make the conveyer movement intermittent. Equivalents may be employed where the exlgenciesof the case demand it. However care should be taken that my machine is synchronized with such other mal chine as delivers the dough rings to the conprovided with a cover, and a funnel from,

, per edge of said bafile V0 er.

Ihe gas burners for heating the oil in the kettle are designated by the numerals 23, and the take-ups at the head end for adjustment of the carrier chains by the numerals 24.

For sanitary reasons the kettle should be the cover to the outside air, but the construction of these accessories is so well known that no particular description of details is necessary.

. Having thus described my invention, it will be seen-that my' objects have been accomplished and, though I have shown the preferred form of construction, I reserve to myself the right to make minor changes providing I do not violate the spirit and principle of my invention. I

I claim:

1. In a doughnut baking machine, the

'combination of an oil containing kettle, an

endless conveyer within the-kettle, partition railings extending in spaced relation across the width of the conveyer, with a baflle late at the tail end of the conveyer, said afile plate inclining from the bottom at one side of the kettle toward the other side of the kettle and terminating near the surface of the oil, a plurality ofopenings nearthe upcirculation of boiling Oll from the under side of the bafile plate and across the width of the conveyer, whereby doughnuts delivered near said openings are caused to travel between the partition railings toward the other side of the kettle.

2. In a doughnut baking machine, the combination of a trough shaped kettle adapted to contain boiling oil, an endless conveyer late to promote a.

plate for distributing the doughnuts over the conveyer, a tunnel ofgrill work submerged in oil to guide the upper run of the conveyer,-

the floor of the tunnel continuing on an inclined plane above the surface of the oil,

and means to make the movement of the conveyer intermittent 4. In a doughnut baking machine, the combination of .a supporting frame, a trough-shaped kettle heating means attached to the frame below the kettle, a tunnel of grill work suspended from the edges of the kettle and roceeding for the greater length of'thefkettle below the surface of the oil, an endless conveyer traveling longitudinally through the kettle,

said conveyer having partition railings extending in spaced re ation across, the width of the conveyer, a baflle plate construction near the tail end adapted to form a platform whereby said railings will the surface of the oil, from w ence the conveyer with the railings'enters the tunnel and submerges dou hnuts, deposited between said rallings, be ow the surface of the oil.

Signed by me at Portland, Oregon, this 6th day of'April, 1920. WILLIAM WALLACE.

adapted to heat oil,

roject above 

